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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Mercury emissions from forest burning in southern Amazon

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Autor(es):
Machado Michelazzo, Paula Albernaz [1] ; Fostier, Anne Helene [1] ; Magarelli, Gabriella [2] ; Santos, Jose Carlos [3] ; Andrade de Carvalho, Jr., Joao [4]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Inst Chem, BR-13083970 Campinas, SP - Brazil
[2] Brazilian Agr Res Corp, BR-70770900 Brasilia, DF - Brazil
[3] Natl Space Res Inst, BR-12630000 Cachoeira Paulista, SP - Brazil
[4] Sao Paulo State Univ, Dept Energy, BR-12516410 Guaratingueta, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Geophysical Research Letters; v. 37, MAY 15 2010.
Citações Web of Science: 7
Resumo

Several recent studies have indicated that forest fires are likely to re-emit important quantities of atmospherically deposited mercury (Hg) to the atmosphere. Although the Amazon forest accounts for approximately 25% of the world's total rainforest, few data are available about these emissions. The emissions of mercury from prescribed fires of two 4-ha plots of Amazon forest were investigated. Hg concentration and Hg burden were determined for vegetation, litter and soil before and after the fires. The data show that only Hg present in the aboveground vegetation and in the O-horizon was volatilised; no significant soil emission was observed. Before the fire, the Hg stored in the vegetation (logs, branches, leaves and litter) ranged from 3.7 to 4.0 g ha(-1) while 1.8 g ha(-1) was found in the O-horizon. The mass balance calculations of the present work indicate an average Hg emission of 3.5 g ha(-1) due to forest fires, with 1.6 ha(-1) originating from O-horizon and 1.9 from above ground vegetation. On the base of the average annual deforestation rate of the Brazilian Amazon between 2000 and 2008, an annual Hg emission of 6.7 Mg yr(-1) was estimated. Citation: Michelazzo, P. A. M., A. H. Fostier, G. Magarelli, J. C. Santos, and J. A. d. Carvalho Jr. (2010), Mercury emissions from forest burning in southern Amazon, Geophys. Res. Lett., 37, L09809, doi: 10.1029/2009GL042220. (AU)

Processo FAPESP: 04/01122-3 - Emissões de mercúrio originárias da combustão de biomassa da Floresta Amazônica e da cana-de-açúcar
Beneficiário:Anne Helene Fostier
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 03/07822-4 - Emissões de mercúrio durante a combustão de biomassa da floresta Amazônica e da cana-de açúcar
Beneficiário:Paula Albernaz Machado Michelazzo
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 02/08964-4 - Concentrações das espécies químicas liberadas durante a combustão de biomassa da Floresta Amazônica
Beneficiário:João Andrade de Carvalho Junior
Modalidade de apoio: Auxílio à Pesquisa - Regular